Carman Dee Barnes (November 20, 1912 – August 19, 1980)  was an American novelist.
Barnes was born in Chattanooga, Tennessee, the daughter of James Hunter Neal and poet and folklorist Lois Diantha Mills (1889-1939). Her last name is that of her first stepfather, Wellington Barnes, founder of the Dixie-Portland Cement Company, who died in 1927. Her mother later married musicologist and Vanderbilt University professor George Pullen Jackson. Barnes attended the Girls' Preparatory School in Chattanooga, the Ward-Belmont School for Girls in Nashville, Tennessee, and the Gardner School in New York City.
Barnes was only sixteen years old when her debut novel, Schoolgirl, was published in 1929. Based on Barnes' own experience at a boarding school for girls, the novel detailed the sexual experimentation, including lesbianism, of Naomi Bradshaw and her fellow students. The scandalous novel was a best seller internationally and got Barnes expelled from the Gardner School when her principal read it. Barnes and dramatist Alfonso Washington Pezet adapted the novel for the stage and it debuted at the Ritz Theatre on Barnes' eighteenth birthday. Starring Joanna Roos as Bradshaw, it was considered a flop and ran only 28 performances. Paramount Pictures purchased the film rights for $30,000, but the novel never made it to the screen. Paramount also signed Barnes to acting and writing contracts, but she never wrote for or acted in films.
Her second novel, Beau Lover (1930), is told entirely in second person singular. She followed this up with Mother, Be Careful! (1932), which satirized Hollywood, and Young Woman (1934), which also featured Naomi Bradshaw. In 1940, she sponsored a lecture series by the architect Claude F. Bragdon which were later collected and published as The Arch Lectures (1942). The next year she studied with esotericist P. D. Ouspensky.
In 1946, Barnes published her final novel, Time Lay Asleep, about a large family in the southern United States. In that book, Barnes experimented with chronological, psychological, and symbolic elements in a way that has been compared to the work of William Faulkner.
After a long separation, Barnes and Armstrong divorced in 1951. Later that year, Barnes left the United States for Austria permanently. Following a series of breakdowns in 1952, she received insulin shock therapy and psychotherapy treatment. Barnes died in Salzburg, Austria, in 1980.
- "Carman Barnes Papers". University of Rochester River Campus Libraries. Retrieved February 16, 2013.
- Gastner, Carol B. (1979). "Carman Dee Barnes". In Mainiero, Lina. American Women Writers: A Critical Reference Guide from Colonial Times to the Present 1. New York: Frederick Ungar Publishing Co. pp. 102–04.
- Simmons, Christina (Autumn 1979). "Companionate Marriage and the Lesbian Threat". Frontiers: A Journal of Women Studies 4 (3): 54–59.
- Gerald Bordman (24 October 1996). American Theatre : A Chronicle of Comedy and Drama, 1930-1969. Oxford University Press. pp. 14–15. ISBN 978-0-19-535808-7. Retrieved 16 February 2013.
- "Broadway People: YOUNG WOMAN. By Carman Barnes". New York Times. 6 Jan 1935. p. 18.